RAN Context Management for 5G Inactive Mode State Transitions
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Solution Overview
Problem
In 5G wireless communication networks, there is a lack of effective solutions for determining the status of terminal devices in inactive mode and processing their contexts, especially when they move between different RAN cells, leading to inefficiencies in resource management and communication delays.
Innovation Solution
A communications method and apparatus that enable state transition and context processing for terminal devices in inactive mode by using RAN-based notification areas (RNA) to page devices and transfer contexts between RAN devices, allowing for efficient load balancing and RNA updates, thereby maintaining the device in inactive mode without transitioning to idle mode unnecessarily.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the terminal device transits to idle mode to release network resources, then network resource utilization is improved, but communication delay increases and service continuity deteriorates
Solution Approach 1:
The patent applies local quality by differentiating the treatment of different terminal devices based on their service requirements. Terminal devices with high service quality requirements are maintained in inactive mode with context stored in the RAN, while other devices can transition to idle mode. This localized differentiation allows the system to optimize resource utilization for specific devices without compromising their communication performance.
Solution Approach 2:
The patent implements preliminary action by pre-storing the context of terminal devices in the RAN before they need to communicate. This advance preparation ensures that when terminal devices need to send data, their context is already available in the RAN, eliminating the need for context retrieval from the core network and reducing communication delay.
2Reliability
If the RAN stores context of terminal devices in inactive mode, then service quality and communication speed are improved, but network resource consumption increases
Solution Approach 1:
The patent applies local quality by selectively storing context in the RAN only for terminal devices that require high service quality. Not all inactive terminal devices have their context stored in the RAN - only those with specific service quality requirements. This selective approach maintains high service quality for necessary devices while avoiding unnecessary resource consumption for others.
3Loss of time
If the terminal device remains in inactive mode, then communication delay is reduced, but network signaling overhead increases when managing device status
Solution Approach 1:
The patent extracts the context management function from the core network and places it in the RAN. By storing terminal device context locally in the RAN rather than retrieving it from the core network for each communication event, the system eliminates repeated signaling exchanges between the RAN and core network, thereby reducing network signaling overhead while maintaining low communication delay.
4Power
If the anchor RAN device releases terminal context to reduce load, then RAN device load is reduced, but service continuity and user experience deteriorate
Solution Approach 1:
The patent applies local quality by differentiating which terminal devices have their context retained in the RAN versus which devices have their context released. Terminal devices with high service quality requirements maintain their context in the RAN for continuous service, while other devices can have their context released to reduce RAN load. This selective approach balances load management with service continuity.
Data Source
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AI summary
This patent application provides a context processing method and apparatus for a terminal device. The method includes: determining, by a first RAN device, to release a context of a terminal device, and sending a first message to a second RAN device, to instruct the second RAN device to page the terminal device, where the first message includes a first identifier of the terminal device and instruction information for releasing the context of the terminal device; and paging, by the second RAN device, the terminal device, and instructing, according to the instruction information for releasing the context of the terminal device, the terminal device to perform state transition.